5W1A

The first X-ray crystal structure of an insect muscle myosin. Drosophila melanogaster, skeletal muscle myosin II, an embryonic isoform, subfragment-1

Replaces:  4QBD

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C (A, C)	Myosin heavy chain, muscle	polymer	810	91851.0	2	UniProt (P05661) Pfam (PF02736) Pfam (PF00063)	Drosophila melanogaster (Fruit fly)
2	B, D (B, D)	Myosin light chain alkali	polymer	155	17551.9	2	UniProt (P06742) Pfam (PF13499)	Drosophila melanogaster (Fruit fly)
3	E, K (A, C)	CITRATE ANION	non-polymer		189.1	2	Chemie (FLC)
4	F, G, L, M (A, C)	GLYCEROL	non-polymer		92.1	4	Chemie (GOL)
5	H, I, J, N (A, C)	1,2-ETHANEDIOL	non-polymer		62.1	4	Chemie (EDO)
6	O, P, Q, R (A, B, C, D)	water	water		18.0	1063	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	218805.9
Non-Polymers*	Number of molecules	10
	Total formula weight	994.8
All*	Total formula weight	219800.8

*Water molecules are not included.